Apply suggestions from code review

Co-authored-by: Victor Stinner <vstinner@python.org>

Author: minrk

Lib/test/test_asyncio/test_selector_thread.py

@@ -7,7 +7,7 @@
 from unittest import mock
 
 
-class SelectorThreadTest((unittest.IsolatedAsyncioTestCase)):
+class SelectorThreadTest(unittest.IsolatedAsyncioTestCase):
     async def asyncSetUp(self):
         self._sockets = []
         self.selector_thread = SelectorThread(asyncio.get_running_loop())
@@ -39,7 +39,7 @@ def recv():
             self.selector_thread.add_reader(b, mock_recv)
             # ready event, but main event loop is blocked for some time
             time.sleep(0.1)
-            recvd = await asyncio.wait_for(first_recv, timeout=10)
+            recvd = await asyncio.wait_for(first_recv, timeout=support.SHORT_TIMEOUT)
         self.assertEqual(recvd, b"msg")
         # make sure recv wasn't scheduled more than once
         self.assertEqual(mock_recv.call_count, 1)
@@ -84,7 +84,7 @@ def bad_recv(sock):
         with mock.patch.object(
             selector_thread, "_start_select", wraps=selector_thread._start_select
         ) as start_select:
-            await asyncio.wait_for(bad_recv_done, timeout=10)
+            await asyncio.wait_for(bad_recv_done, timeout=support.SHORT_TIMEOUT)
 
         # make sure recv is called N + 1 times,
         # exception N times,

Lib/test/test_asyncio/test_windows_events.py

@@ -363,7 +363,7 @@ def read():
             self.loop.add_writer(a, write)
             self.assertIs(self.loop._selector_thread, _selector_thread)
             self.assertIn(a.fileno(), _selector_thread._writers)
-            msg = await asyncio.wait_for(read_future, timeout=10)
+            msg = await asyncio.wait_for(read_future, timeout=support.SHORT_TIMEOUT)
 
             self.loop.remove_writer(a)
             self.assertNotIn(a.fileno(), _selector_thread._writers)